Understanding Market Signals and Price Gaps

What Are Market Signals?

A market signal is any data point that suggests an actionable opportunity. In prediction markets, signals come from structural inefficiencies between platforms, large-trader behavior, and pricing anomalies.

Signals are not predictions — they're research inputs. A signal tells you "something interesting is happening here" and invites further investigation. The best traders use signals as starting points, not conclusions.

Signal Type: Arbitrage

Arbitrage signals fire when the same event is priced differently enough across Polymarket and Kalshi that buying both sides generates guaranteed profit after fees.

These are the highest-confidence signals because they're mathematically verifiable. There's no subjective judgment — either the numbers work or they don't. Arbitrage signals are relatively rare and often short-lived, which is why real-time detection matters.

Signal Type: Whale Activity

Whale signals fire when large trades ($1,000+) hit a market. A single whale trade might not mean much, but clusters of whale activity — multiple large wallets taking the same side — are strong directional indicators.

Whale signals carry the most uncertainty of the three types. Large trades can be hedges, mistakes, or market-making activity. The key is context: wallet history, trade timing, and whether the trade is with or against the current trend.

Signal Type: Price Gaps

Price gap signals fire when the same event trades at materially different prices across platforms, even if the gap isn't large enough for profitable arbitrage after fees.

A persistent 4% price gap that doesn't qualify as arbitrage (after Kalshi fees) still tells you something valuable: the platforms disagree on probability. This disagreement is a research opportunity — which platform's users are better informed for this particular event?

Price gaps often narrow over time as information spreads, so identifying them early gives you an edge.

Combining Signals

The most powerful research comes from combining multiple signal types. For example:

A market with a price gap AND whale activity on the cheaper platform suggests informed money is exploiting a mispricing.

An arbitrage opportunity with declining volume might close before you can execute, while one with rising volume is more stable.

Whale activity that drives a price gap wider (not narrower) might indicate the whale knows something the broader market hasn't priced in yet.

Signals on ProfitLabs

ProfitLabs runs signal detection across all matched markets in real time. Each signal type has a visual badge — green for arbitrage, purple for whale activity, yellow for price gaps.

The feed page aggregates all signals into a scored, filterable stream. Markets with multiple signal types are ranked higher. You can filter by signal type and sort by signal strength to focus on the opportunities that match your strategy.